1 %************************************************************************
3 \section[Driver-asm-fiddling]{Fiddling with assembler files}
5 %************************************************************************
10 Utterly stomp out C functions' prologues and epilogues; i.e., the
11 stuff to do with the C stack.
13 Any other required tidying up.
16 General note [chak]: Many regexps are very fragile because they rely on white
17 space being in the right place. This caused trouble with gcc 2.95 (at least
18 on Linux), where the use of white space in .s files generated by gcc suddenly
19 changed. To guarantee compatibility across different versions of gcc, make
20 sure (at least on i386-.*-linux) that regexps tolerate varying amounts of white
21 space between an assembler statement and its arguments as well as after a the
22 comma separating multiple arguments.
24 \emph{For the time being, I have corrected the regexps for i386-.*-linux. I
25 didn't touch all the regexps for other i386 platforms, as I don't have
26 a box to test these changes.}
31 The HP linker is very picky about symbols being in the appropriate
32 space (code vs. data). When we mangle the threaded code to put the
33 info tables just prior to the code, they wind up in code space
34 rather than data space. This means that references to *_info from
35 un-mangled parts of the RTS (e.g. unthreaded GC code) get
36 unresolved symbols. Solution: mini-mangler for .c files on HP. I
37 think this should really be triggered in the driver by a new -rts
38 option, so that user code doesn't get mangled inappropriately.
40 With reversed tables, jumps are to the _info label rather than to
41 the _entry label. The _info label is just an address in code
42 space, rather than an entry point with the descriptive blob we
43 talked about yesterday. As a result, you can't use the call-style
44 JMP_ macro. However, some JMP_ macros take _info labels as targets
45 and some take code entry points within the RTS. The latter won't
46 work with the goto-style JMP_ macro. Sigh. Solution: Use the goto
47 style JMP_ macro, and mangle some more assembly, changing all
48 "RP'literal" and "LP'literal" references to "R'literal" and
49 "L'literal," so that you get the real address of the code, rather
50 than the descriptive blob. Also change all ".word P%literal"
51 entries in info tables and vector tables to just ".word literal,"
52 for the same reason. Advantage: No more ridiculous call sequences.
55 %************************************************************************
57 \subsection{Top-level code}
59 %************************************************************************
62 $TargetPlatform = $TARGETPLATFORM;
64 ($Pgm = $0) =~ s|.*/||;
68 if ( $TargetPlatform =~ /^i386-/ ) {
72 $StolenX86Regs = $ARGV[2];
76 &mangle_asm($ifile,$ofile);
81 %************************************************************************
83 \subsection{Constants for various architectures}
85 %************************************************************************
88 sub init_TARGET_STUFF {
90 #--------------------------------------------------------#
91 if ( $TargetPlatform =~ /^alpha-.*-.*/ ) {
93 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
94 $T_US = ''; # _ if symbols have an underscore on the front
95 $T_PRE_APP = 'DONT THINK THIS APPLIES'; # regexp that says what comes before APP/NO_APP
96 $T_CONST_LBL = '^\$L?C(\d+):$'; # regexp for what such a lbl looks like
99 $T_MOVE_DIRVS = '^(\s*(\$.*\.\.ng:|\.align\s+\d+|\.(globl|ent)\s+\S+|\#.*|\.(file|loc)\s+\S+\s+\S+|\.text|\.r?data)\n)';
100 $T_COPY_DIRVS = '^\s*(\$.*\.\.ng:|\#|\.(file|globl|ent|loc))';
102 $T_DOT_WORD = '\.(long|quad|byte|word)';
103 $T_DOT_GLOBAL = '^\t\.globl';
104 $T_HDR_literal = "\.rdata\n\t\.align 3\n";
105 $T_HDR_misc = "\.text\n\t\.align 3\n";
106 $T_HDR_data = "\.data\n\t\.align 3\n";
107 $T_HDR_rodata = "\.rdata\n\t\.align 3\n";
108 $T_HDR_closure = "\.data\n\t\.align 3\n";
109 $T_HDR_info = "\.text\n\t\.align 3\n";
110 $T_HDR_entry = "\.text\n\t\.align 3\n";
111 $T_HDR_vector = "\.text\n\t\.align 3\n";
113 #--------------------------------------------------------#
114 } elsif ( $TargetPlatform =~ /^hppa/ ) {
116 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
117 $T_US = ''; # _ if symbols have an underscore on the front
118 $T_PRE_APP = 'DONT THINK THIS APPLIES'; # regexp that says what comes before APP/NO_APP
119 $T_CONST_LBL = '^L\$C(\d+)$'; # regexp for what such a lbl looks like
122 $T_MOVE_DIRVS = '^((\s+\.(IMPORT|EXPORT|PARAM).*|\s+\.align\s+\d+|\s+\.(SPACE|SUBSPA)\s+\S+|\s*)\n)';
123 $T_COPY_DIRVS = '^\s+\.(IMPORT|EXPORT)';
125 $T_DOT_WORD = '\.(blockz|word|half|byte)';
126 $T_DOT_GLOBAL = '^\s+\.EXPORT';
127 $T_HDR_literal = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$LIT\$\n";
128 $T_HDR_misc = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
129 $T_HDR_data = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
130 $T_HDR_rodata = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
131 $T_HDR_closure = "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$DATA\$\n\t\.align 4\n";
132 $T_HDR_info = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
133 $T_HDR_entry = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
134 $T_HDR_vector = "\t.SPACE \$TEXT\$\n\t.SUBSPA \$CODE\$\n\t\.align 4\n";
136 #--------------------------------------------------------#
137 } elsif ( $TargetPlatform =~ /^i386-.*-(linuxaout|freebsd2|nextstep3|cygwin32|mingw32)$/ ) {
138 # NeXT added but not tested. CaS
140 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
141 $T_US = '_'; # _ if symbols have an underscore on the front
142 $T_PRE_APP = '^#'; # regexp that says what comes before APP/NO_APP
143 $T_CONST_LBL = '^LC(\d+):$';
145 $T_X86_PRE_LLBL_PAT = 'L';
146 $T_X86_PRE_LLBL = 'L';
147 $T_X86_BADJMP = '^\tjmp [^L\*]';
149 $T_MOVE_DIRVS = '^(\s*(\.(p2)?align\s+\d+(,0x90)?|\.globl\s+\S+|\.text|\.data|\.stab[^n].*|\.type\s+.*|\.size\s+.*|\.lcomm.*)\n)';
150 $T_COPY_DIRVS = '\.(globl|stab|lcomm)';
151 $T_DOT_WORD = '\.(long|word|value|byte|space)';
152 $T_DOT_GLOBAL = '\.globl';
153 $T_HDR_literal = "\.text\n\t\.align 2\n";
154 $T_HDR_misc = "\.text\n\t\.align 2,0x90\n";
155 $T_HDR_data = "\.data\n\t\.align 2\n";
156 $T_HDR_rodata = "\.text\n\t\.align 2\n";
157 $T_HDR_closure = "\.data\n\t\.align 2\n";
158 $T_HDR_info = "\.text\n\t\.align 2\n"; # NB: requires padding
159 $T_HDR_entry = "\.text\n"; # no .align so we're right next to _info (arguably wrong...?)
160 $T_HDR_vector = "\.text\n\t\.align 2\n"; # NB: requires padding
162 #--------------------------------------------------------#
163 } elsif ( $TargetPlatform =~ /^i386-.*-(solaris2|linux|freebsd|netbsd|openbsd)$/ ) {
165 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
166 $T_US = ''; # _ if symbols have an underscore on the front
167 $T_PRE_APP = # regexp that says what comes before APP/NO_APP
168 ($TargetPlatform =~ /-(linux|freebsd|netbsd|openbsd)$/) ? '#' : '/' ;
169 $T_CONST_LBL = '^\.LC(\d+):$'; # regexp for what such a lbl looks like
171 $T_X86_PRE_LLBL_PAT = '\.L';
172 $T_X86_PRE_LLBL = '.L';
173 $T_X86_BADJMP = '^\tjmp\s+[^\.\*]';
175 $T_MOVE_DIRVS = '^(\s*(\.(p2)?align\s+\d+(,\s*0x90)?|\.globl\s+\S+|\.text|\.data|\.section\s+.*|\.type\s+.*|\.size\s+\S+\s*,\s*\d+|\.ident.*|\.local.*)\n)';
176 $T_COPY_DIRVS = '^\s*\.(globl|type|size|local)';
178 $T_DOT_WORD = '\.(long|value|word|byte|zero)';
179 $T_DOT_GLOBAL = '\.globl';
180 $T_HDR_literal = "\.section\t\.rodata\n"; # or just use .text??? (WDP 95/11)
181 $T_HDR_misc = "\.text\n\t\.align 4\n";
182 $T_HDR_data = "\.data\n\t\.align 4\n";
183 $T_HDR_rodata = "\.section\t\.rodata\n\t\.align 4\n";
184 $T_HDR_closure = "\.data\n\t\.align 4\n";
185 $T_HDR_info = "\.text\n\t\.align 4\n";
186 $T_HDR_entry = "\.text\n"; # no .align so we're right next to _info (arguably wrong...?)
187 $T_HDR_vector = "\.text\n\t\.align 4\n"; # NB: requires padding
189 #--------------------------------------------------------#
190 } elsif ( $TargetPlatform =~ /^ia64-.*-linux$/ ) {
192 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
193 $T_US = ''; # _ if symbols have an underscore on the front
195 $T_CONST_LBL = '^\.LC(\d+):$'; # regexp for what such a lbl looks like
198 $T_MOVE_DIRVS = '^(\s*\.(global|proc|pred\.safe_across_calls|text|data|section|subsection|align|size|type|ident)\s+.*\n)';
199 $T_COPY_DIRVS = '\.(global|proc)';
201 $T_DOT_WORD = '\.(long|value|byte|zero)';
202 $T_DOT_GLOBAL = '\.global';
203 $T_HDR_literal = "\.section\t\.rodata\n";
204 $T_HDR_misc = "\.text\n\t\.align 8\n";
205 $T_HDR_data = "\.data\n\t\.align 8\n";
206 $T_HDR_rodata = "\.section\t\.rodata\n\t\.align 8\n";
207 $T_HDR_closure = "\.data\n\t\.align 8\n";
208 $T_HDR_info = "\.text\n\t\.align 8\n";
209 $T_HDR_entry = "\.text\n\t\.align 16\n";
210 $T_HDR_vector = "\.text\n\t\.align 8\n";
212 #--------------------------------------------------------#
213 } elsif ( $TargetPlatform =~ /^x86_64-.*-(linux|openbsd)$/ ) {
215 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
216 $T_US = ''; # _ if symbols have an underscore on the front
218 $T_CONST_LBL = '^\.LC(\d+):$'; # regexp for what such a lbl looks like
221 $T_MOVE_DIRVS = '^(\s*\.(globl|text|data|section|align|size|type|ident|local)\s+.*\n)';
222 $T_COPY_DIRVS = '\.(globl|local)';
224 $T_DOT_WORD = '\.(quad|long|value|byte|zero)';
225 $T_DOT_GLOBAL = '\.global';
226 $T_HDR_literal = "\.section\t\.rodata\n";
227 $T_HDR_misc = "\.text\n\t\.align 8\n";
228 $T_HDR_data = "\.data\n\t\.align 8\n";
229 $T_HDR_rodata = "\.section\t\.rodata\n\t\.align 8\n";
230 $T_HDR_closure = "\.data\n\t\.align 8\n";
231 $T_HDR_info = "\.text\n\t\.align 8\n";
232 $T_HDR_entry = "\.text\n\t\.align 8\n";
233 $T_HDR_vector = "\.text\n\t\.align 8\n";
235 #--------------------------------------------------------#
236 } elsif ( $TargetPlatform =~ /^m68k-.*-sunos4/ ) {
238 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
239 $T_US = '_'; # _ if symbols have an underscore on the front
240 $T_PRE_APP = '^# MAY NOT APPLY'; # regexp that says what comes before APP/NO_APP
241 $T_CONST_LBL = '^LC(\d+):$';
244 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+|\.proc\s+\d+|\.const|\.cstring|\.globl\s+\S+|\.text|\.data|\.even|\.stab[^n].*)\n)';
245 $T_COPY_DIRVS = '\.(globl|proc|stab)';
247 $T_DOT_WORD = '\.long';
248 $T_DOT_GLOBAL = '\.globl';
249 $T_HDR_literal = "\.text\n\t\.even\n";
250 $T_HDR_misc = "\.text\n\t\.even\n";
251 $T_HDR_data = "\.data\n\t\.even\n";
252 $T_HDR_rodata = "\.text\n\t\.even\n";
253 $T_HDR_closure = "\.data\n\t\.even\n";
254 $T_HDR_info = "\.text\n\t\.even\n";
255 $T_HDR_entry = "\.text\n\t\.even\n";
256 $T_HDR_vector = "\.text\n\t\.even\n";
258 #--------------------------------------------------------#
259 } elsif ( $TargetPlatform =~ /^mips-.*/ ) {
261 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
262 $T_US = ''; # _ if symbols have an underscore on the front
263 $T_PRE_APP = '^\s*#'; # regexp that says what comes before APP/NO_APP
264 $T_CONST_LBL = '^\$LC(\d+):$'; # regexp for what such a lbl looks like
267 $T_MOVE_DIRVS = '^(\s*(\.align\s+\d+|\.(globl|ent)\s+\S+|\.text|\.r?data)\n)';
268 $T_COPY_DIRVS = '\.(globl|ent)';
270 $T_DOT_WORD = '\.word';
271 $T_DOT_GLOBAL = '^\t\.globl';
272 $T_HDR_literal = "\t\.rdata\n\t\.align 2\n";
273 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
274 $T_HDR_data = "\t\.data\n\t\.align 2\n";
275 $T_HDR_rodata = "\t\.rdata\n\t\.align 2\n";
276 $T_HDR_closure = "\t\.data\n\t\.align 2\n";
277 $T_HDR_info = "\t\.text\n\t\.align 2\n";
278 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
279 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
281 #--------------------------------------------------------#
282 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ ) {
283 # Apple PowerPC Darwin/MacOS X.
284 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
285 $T_US = '_'; # _ if symbols have an underscore on the front
286 $T_PRE_APP = 'DOESNT APPLY'; # regexp that says what comes before APP/NO_APP
287 $T_CONST_LBL = '^\LC\d+:'; # regexp for what such a lbl looks like
290 $T_MOVE_DIRVS = '^(\s*(\.align \d+|\.text|\.data|\.const_data|\.cstring|\.non_lazy_symbol_pointer|\.const|\.static_const|\.literal4|\.literal8|\.static_data|\.globl \S+|\.section .*|\.lcomm.*)\n)';
291 $T_COPY_DIRVS = '\.(globl|lcomm)';
293 $T_DOT_WORD = '\.(long|short|byte|fill|space)';
294 $T_DOT_GLOBAL = '\.globl';
295 $T_HDR_toc = "\.toc\n";
296 $T_HDR_literal = "\t\.const_data\n\t\.align 2\n";
297 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
298 $T_HDR_data = "\t\.data\n\t\.align 2\n";
299 $T_HDR_rodata = "\t\.const_data\n\t\.align 2\n";
300 $T_HDR_closure = "\t\.const_data\n\t\.align 2\n";
301 $T_HDR_info = "\t\.text\n\t\.align 2\n";
302 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
303 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
305 #--------------------------------------------------------#
306 } elsif ( $TargetPlatform =~ /^powerpc-.*-linux/ ) {
308 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
309 $T_US = ''; # _ if symbols have an underscore on the front
310 $T_PRE_APP = '^#'; # regexp that says what comes before APP/NO_APP
311 $T_CONST_LBL = '^\.LC\d+:'; # regexp for what such a lbl looks like
314 $T_MOVE_DIRVS = '^(\s*(\.(p2)?align\s+\d+(,\s*0x90)?|\.globl\s+\S+|\.text|\.data|\.section\s+.*|\.type\s+.*|\.size\s+\S+\s*,\s*\d+|\.ident.*|\.local.*)\n)';
315 $T_COPY_DIRVS = '^\s*\.(globl|type|size|local)';
317 $T_DOT_WORD = '\.(long|short|byte|fill|space)';
318 $T_DOT_GLOBAL = '\.globl';
319 $T_HDR_toc = "\.toc\n";
320 $T_HDR_literal = "\t\.section\t.rodata\n\t\.align 2\n";
321 $T_HDR_misc = "\t\.text\n\t\.align 2\n";
322 $T_HDR_data = "\t\.data\n\t\.align 2\n";
323 $T_HDR_rodata = "\t\.section\t.rodata\n\t\.align 2\n";
324 $T_HDR_closure = "\t\.data\n\t\.align 2\n";
325 $T_HDR_info = "\t\.text\n\t\.align 2\n";
326 $T_HDR_entry = "\t\.text\n\t\.align 2\n";
327 $T_HDR_vector = "\t\.text\n\t\.align 2\n";
329 #--------------------------------------------------------#
330 } elsif ( $TargetPlatform =~ /^sparc-.*-(solaris2|openbsd)/ ) {
332 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
333 $T_US = ''; # _ if symbols have an underscore on the front
334 $T_PRE_APP = 'DOES NOT SEEM TO APPLY'; # regexp that says what comes before APP/NO_APP
335 $T_CONST_LBL = '^\.LLC(\d+):$'; # regexp for what such a lbl looks like
338 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.stab.*|\.section.*|\s+\.type.*|\s+\.size.*)\n)';
339 $T_COPY_DIRVS = '\.(global|proc|stab)';
341 $T_DOT_WORD = '\.(long|word|byte|half|skip|uahalf|uaword)';
342 $T_DOT_GLOBAL = '^\t\.global';
343 $T_HDR_literal = "\.text\n\t\.align 8\n";
344 $T_HDR_misc = "\.text\n\t\.align 4\n";
345 $T_HDR_data = "\.data\n\t\.align 8\n";
346 $T_HDR_rodata = "\.text\n\t\.align 4\n";
347 $T_HDR_closure = "\.data\n\t\.align 4\n";
348 $T_HDR_info = "\.text\n\t\.align 4\n";
349 $T_HDR_entry = "\.text\n\t\.align 4\n";
350 $T_HDR_vector = "\.text\n\t\.align 4\n";
352 #--------------------------------------------------------#
353 } elsif ( $TargetPlatform =~ /^sparc-.*-sunos4/ ) {
355 $T_STABBY = 1; # 1 iff .stab things (usually if a.out format)
356 $T_US = '_'; # _ if symbols have an underscore on the front
357 $T_PRE_APP = '^# DOES NOT SEEM TO APPLY'; # regexp that says what comes before APP/NO_APP
358 $T_CONST_LBL = '^LC(\d+):$';
361 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.stab.*)\n)';
362 $T_COPY_DIRVS = '\.(global|proc|stab)';
364 $T_DOT_WORD = '\.word';
365 $T_DOT_GLOBAL = '^\t\.global';
366 $T_HDR_literal = "\.text\n\t\.align 8\n";
367 $T_HDR_misc = "\.text\n\t\.align 4\n";
368 $T_HDR_data = "\.data\n\t\.align 8\n";
369 $T_HDR_rodata = "\.text\n\t\.align 4\n";
370 $T_HDR_closure = "\.data\n\t\.align 4\n";
371 $T_HDR_info = "\.text\n\t\.align 4\n";
372 $T_HDR_entry = "\.text\n\t\.align 4\n";
373 $T_HDR_vector = "\.text\n\t\.align 4\n";
375 #--------------------------------------------------------#
376 } elsif ( $TargetPlatform =~ /^sparc-.*-linux/ ) {
377 $T_STABBY = 0; # 1 iff .stab things (usually if a.out format)
378 $T_US = ''; # _ if symbols have an underscore on the front
379 $T_PRE_APP = '#'; # regexp that says what comes before APP/NO_APP
380 # Probably doesn't apply anyway
381 $T_CONST_LBL = '^\.LLC(\d+):$'; # regexp for what such a lbl looks like
384 $T_MOVE_DIRVS = '^((\s+\.align\s+\d+|\s+\.proc\s+\d+|\s+\.global\s+\S+|\.text|\.data|\.seg|\.stab.*|\t?\.section.*|\s+\.type.*|\s+\.size.*)\n)';
385 $T_COPY_DIRVS = '\.(global|globl|proc|stab)';
387 $T_DOT_WORD = '\.(long|word|nword|xword|byte|half|short|skip|uahalf|uaword)';
388 $T_DOT_GLOBAL = '^\t\.global';
389 $T_HDR_literal = "\.text\n\t\.align 8\n";
390 $T_HDR_misc = "\.text\n\t\.align 4\n";
391 $T_HDR_data = "\.data\n\t\.align 8\n";
392 $T_HDR_rodata = "\.text\n\t\.align 4\n";
393 $T_HDR_closure = "\.data\n\t\.align 4\n";
394 $T_HDR_info = "\.text\n\t\.align 4\n";
395 $T_HDR_entry = "\.text\n\t\.align 4\n";
396 $T_HDR_vector = "\.text\n\t\.align 4\n";
398 #--------------------------------------------------------#
400 print STDERR "$Pgm: don't know how to mangle assembly language for: $TargetPlatform\n";
405 print STDERR "T_STABBY: $T_STABBY\n";
406 print STDERR "T_US: $T_US\n";
407 print STDERR "T_PRE_APP: $T_PRE_APP\n";
408 print STDERR "T_CONST_LBL: $T_CONST_LBL\n";
409 print STDERR "T_POST_LBL: $T_POST_LBL\n";
410 if ( $TargetPlatform =~ /^i386-/ ) {
411 print STDERR "T_X86_PRE_LLBL_PAT: $T_X86_PRE_LLBL_PAT\n";
412 print STDERR "T_X86_PRE_LLBL: $T_X86_PRE_LLBL\n";
413 print STDERR "T_X86_BADJMP: $T_X86_BADJMP\n";
415 print STDERR "T_MOVE_DIRVS: $T_MOVE_DIRVS\n";
416 print STDERR "T_COPY_DIRVS: $T_COPY_DIRVS\n";
417 print STDERR "T_DOT_WORD: $T_DOT_WORD\n";
418 print STDERR "T_HDR_literal: $T_HDR_literal\n";
419 print STDERR "T_HDR_misc: $T_HDR_misc\n";
420 print STDERR "T_HDR_data: $T_HDR_data\n";
421 print STDERR "T_HDR_rodata: $T_HDR_rodata\n";
422 print STDERR "T_HDR_closure: $T_HDR_closure\n";
423 print STDERR "T_HDR_info: $T_HDR_info\n";
424 print STDERR "T_HDR_entry: $T_HDR_entry\n";
425 print STDERR "T_HDR_vector: $T_HDR_vector\n";
431 %************************************************************************
433 \subsection{Mangle away}
435 %************************************************************************
439 local($in_asmf, $out_asmf) = @_;
441 # multi-line regexp matching:
446 &init_TARGET_STUFF();
447 &init_FUNNY_THINGS();
449 open(INASM, "< $in_asmf")
450 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
451 open(OUTASM,"> $out_asmf")
452 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
454 # read whole file, divide into "chunks":
455 # record some info about what we've found...
457 @chk = (); # contents of the chunk
458 $numchks = 0; # number of them
459 @chkcat = (); # what category of thing in each chunk
460 @chksymb = (); # what symbol(base) is defined in this chunk
461 %entrychk = (); # ditto, its entry code
462 %closurechk = (); # ditto, the (static) closure
463 %srtchk = (); # ditto, its SRT (for top-level things)
464 %infochk = (); # given a symbol base, say what chunk its info tbl is in
465 %vectorchk = (); # ditto, return vector table
466 $EXTERN_DECLS = ''; # .globl <foo> .text (MIPS only)
468 $i = 0; $chkcat[0] = 'misc'; $chk[0] = '';
471 tr/\r//d if $TargetPlatform =~ /-mingw32$/; # In case Perl doesn't convert line endings
472 next if $T_STABBY && /^\.stab.*${T_US}__stg_split_marker/o;
473 next if $T_STABBY && /^\.stab.*ghc.*c_ID/;
474 next if /^\t\.def.*endef$/;
475 next if /${T_PRE_APP}(NO_)?APP/o;
476 next if /^;/ && $TargetPlatform =~ /^hppa/;
478 next if /(^$|^\t\.file\t|^ # )/ && $TargetPlatform =~ /^(mips|ia64)-/;
480 if ( $TargetPlatform =~ /^mips-/
481 && /^\t\.(globl\S+\.text|comm\t)/ ) {
482 $EXTERN_DECLS .= $_ unless /(__DISCARD__|\b(PK_|ASSIGN_)(FLT|DBL)\b)/;
483 # Treat .comm variables as data. These show up in two (known) places:
485 # - the module_registered variable used in the __stginit fragment.
486 # even though these are declared static and initialised, gcc 3.3
487 # likes to make them .comm, presumably to save space in the
490 # - global variables used to pass arguments from C to STG in
491 # a foreign export. (is this still true? --SDM)
493 } elsif ( /^\t\.comm.*$/ ) {
495 $chkcat[$i] = 'data';
498 # Labels ending "_str": these are literal strings.
499 } elsif ( /^${T_US}([A-Za-z0-9_]+)_str${T_POST_LBL}$/ ) {
501 $chkcat[$i] = 'rodata';
504 } elsif ( /^\s+/ ) { # most common case first -- a simple line!
505 # duplicated from the bottom
509 } elsif ( /\.\.ng:$/ && $TargetPlatform =~ /^alpha-/ ) {
510 # Alphas: Local labels not to be confused with new chunks
513 # NB: all the rest start with a non-space
515 } elsif ( $TargetPlatform =~ /^mips-/
516 && /^\d+:/ ) { # a funny-looking very-local label
519 } elsif ( /$T_CONST_LBL/o ) {
521 $chkcat[$i] = 'literal';
524 } elsif ( /^${T_US}__stg_split_marker(\d*)${T_POST_LBL}$/o ) {
526 $chkcat[$i] = 'splitmarker';
529 } elsif ( /^${T_US}([A-Za-z0-9_]+)_info${T_POST_LBL}$/o ) {
532 $chkcat[$i] = 'infotbl';
533 $chksymb[$i] = $symb;
535 die "Info table already? $symb; $i\n" if defined($infochk{$symb});
537 $infochk{$symb} = $i;
539 } elsif ( /^${T_US}([A-Za-z0-9_]+)_(entry|ret)${T_POST_LBL}$/o ) {
541 $chkcat[$i] = 'entry';
546 } elsif ( /^${T_US}([A-Za-z0-9_]+)_closure${T_POST_LBL}$/o ) {
548 $chkcat[$i] = 'closure';
551 $closurechk{$1} = $i;
553 } elsif ( /^${T_US}([A-Za-z0-9_]+)_srt${T_POST_LBL}$/o ) {
560 } elsif ( /^${T_US}([A-Za-z0-9_]+)_ct${T_POST_LBL}$/o ) {
562 $chkcat[$i] = 'data';
565 } elsif ( /^(${T_US}__gnu_compiled_c|gcc2_compiled\.)${T_POST_LBL}/o ) {
568 } elsif ( /^${T_US}[A-Za-z0-9_]+\.\d+${T_POST_LBL}$/o
569 || /^${T_US}.*_CAT${T_POST_LBL}$/o # PROF: _entryname_CAT
570 || /^${T_US}.*_done${T_POST_LBL}$/o # PROF: _module_done
571 || /^${T_US}_module_registered${T_POST_LBL}$/o # PROF: _module_registered
574 $chkcat[$i] = 'data';
577 } elsif ( /^([A-Za-z0-9_]+)\s+\.comm/ && $TargetPlatform =~ /^hppa/ ) {
582 } elsif ( /^${T_US}([A-Za-z0-9_]+)_cc(s)?${T_POST_LBL}$/o ) {
583 # all CC_ symbols go in the data section...
585 $chkcat[$i] = 'data';
588 } elsif ( /^${T_US}([A-Za-z0-9_]+)_(alt|dflt)${T_POST_LBL}$/o ) {
590 $chkcat[$i] = 'misc';
592 } elsif ( /^${T_US}([A-Za-z0-9_]+)_vtbl${T_POST_LBL}$/o ) {
594 $chkcat[$i] = 'vector';
599 } elsif ( $TargetPlatform =~ /^i386-.*-solaris2/
600 && /^[A-Za-z0-9][A-Za-z0-9_]*:/ ) {
601 # Some Solaris system headers contain function definitions (as
602 # opposed to mere prototypes), which end up in the .hc file when
603 # a Haskell module foreign imports the corresponding system
604 # functions (most notably stat()). We put them into the text
605 # segment. Note that this currently does not extend to function
606 # names starting with an underscore.
609 $chkcat[$i] = 'misc';
612 } elsif ( /^${T_US}[A-Za-z0-9_]/o
613 && ( $TargetPlatform !~ /^hppa/ # need to avoid local labels in this case
614 || ! /^L\$\d+$/ ) ) {
618 print STDERR "Warning: retaining unknown function \`$thing' in output from C compiler\n"
619 unless # $KNOWN_FUNNY_THING{$thing}
620 /^${T_US}stg_.*${T_POST_LBL}$/o # RTS internals
621 || /^${T_US}__stg_.*${T_POST_LBL}$/o # more RTS internals
622 || /^${T_US}__fexp_.*${T_POST_LBL}$/o # foreign export
623 || /^${T_US}.*_slow${T_POST_LBL}$/o # slow entry
624 || /^${T_US}__stginit.*${T_POST_LBL}$/o # __stginit<module>
625 || /^${T_US}.*_btm${T_POST_LBL}$/o # large bitmaps
626 || /^${T_US}.*_srtd${T_POST_LBL}$/o # large bitmaps
627 || /^${T_US}.*_fast${T_POST_LBL}$/o # primops
628 || /^${T_US}.*_closure_tbl${T_POST_LBL}$/o # closure tables
629 || /^_uname:/o; # x86/Solaris2
631 $chkcat[$i] = 'misc';
634 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && (
636 || /^\.section __TEXT,__picsymbol_stub1,.*/
638 || /^\.section __TEXT,__symbol_stub1,.*/
639 || /^\.lazy_symbol_pointer/
640 || /^\.non_lazy_symbol_pointer/ ))
643 $chkcat[$i] = 'dyld';
645 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && /^\.data/ && $chkcat[$i] eq 'dyld')
646 { # non_lazy_symbol_ptrs that point to local symbols
648 $chkcat[$i] = 'dyld';
650 } else { # simple line (duplicated at the top)
655 $numchks = $#chk + 1;
657 # open CHUNKS, ">/tmp/chunks1" or die "Cannot open /tmp/chunks1: $!\n";
658 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
661 # the division into chunks is imperfect;
662 # we throw some things over the fence into the next
665 # also, there are things we would like to know
666 # about the whole module before we start spitting
669 local($FIRST_MANGLABLE) = ($TargetPlatform =~ /^(alpha-|hppa|mips-)/) ? 1 : 0;
670 local($FIRST_TOSSABLE ) = ($TargetPlatform =~ /^(hppa|mips-)/) ? 1 : 0;
672 # print STDERR "first chunk to mangle: $FIRST_MANGLABLE\n";
674 # Alphas: NB: we start meddling at chunk 1, not chunk 0
675 # The first ".rdata" is quite magical; as of GCC 2.7.x, it
676 # spits a ".quad 0" in after the very first ".rdata"; we
677 # detect this special case (tossing the ".quad 0")!
678 local($magic_rdata_seen) = 0;
680 # HPPAs, MIPSen: also start medding at chunk 1
682 for ($i = $FIRST_TOSSABLE; $i < $numchks; $i++) {
683 $c = $chk[$i]; # convenience copy
685 # print STDERR "\nCHK $i (BEFORE) (",$chkcat[$i],"):\n", $c;
687 # toss all prologue stuff; HPPA is pretty weird
689 $c = &hppa_mash_prologue($c) if $TargetPlatform =~ /^hppa-/;
691 # be slightly paranoid to make sure there's
692 # nothing surprising in there
693 if ( $c =~ /--- BEGIN ---/ ) {
694 if (($p, $r) = split(/--- BEGIN ---/, $c)) {
696 # remove junk whitespace around the split point
700 if ($TargetPlatform =~ /^i386-/) {
701 $p =~ s/^\tpushl\s+\%edi\n//;
702 $p =~ s/^\tpushl\s+\%esi\n//;
703 $p =~ s/^\tpushl\s+\%ebx\n//;
704 $p =~ s/^\tmovl\s+\%esi,\s*\d*\(\%esp\)\n//;
705 $p =~ s/^\tmovl\s+\%edi,\s*\d*\(\%esp\)\n//;
706 $p =~ s/^\tsubl\s+\$\d+,\s*\%esp\n//;
707 $p =~ s/^\tmovl\s+\$\d+,\s*\%eax\n\tcall\s+__alloca\n// if ($TargetPlatform =~ /^.*-cygwin32/);
709 # GCC 3.1 is in the habit of adding spurious writes to the
710 # stack in the prologue. Just to be on the safe side,
711 # chuck these over the fence into the main code.
712 while ($p =~ /^\tmovl\s+\$\d+,\s*\d*\(\%esp\)\n/) {
713 # print "Spurious instruction: $&";
718 } elsif ($TargetPlatform =~ /^x86_64-/) {
719 $p =~ s/^\tpushq\s+\%r(bx|bp|12|13|14)\n//g;
720 $p =~ s/^\tmovq\s+\%r(bx|bp|12|13|14),\s*\d*\(\%rsp\)\n//g;
721 $p =~ s/^\tsubq\s+\$\d+,\s*\%rsp\n//;
723 } elsif ($TargetPlatform =~ /^ia64-/) {
724 $p =~ s/^\t\.prologue .*\n//;
725 $p =~ s/^\t\.save ar\.pfs, r\d+\n\talloc r\d+ = ar\.pfs, 0, 3[12], \d+, 0\n//;
726 $p =~ s/^\t\.fframe \d+\n\tadds r12 = -\d+, r12\n//;
727 $p =~ s/^\t\.save rp, r\d+\n\tmov r\d+ = b0\n//;
728 $p =~ s/^\t\.(mii|mmi)\n//g; # bundling is no longer sensible
729 $p =~ s/^\t;;\n//g; # discard stops
730 $p =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
732 # GCC 3.3 saves r1 in the prologue, move this to the body
733 if ($p =~ /^\tmov r\d+ = r1\n/) {
737 } elsif ($TargetPlatform =~ /^m68k-/) {
738 $p =~ s/^\tlink a6,#-?\d.*\n//;
739 $p =~ s/^\tpea a6@\n\tmovel sp,a6\n//;
740 # The above showed up in the asm code,
741 # so I added it here.
742 # I hope it's correct.
744 $p =~ s/^\tmovel d2,sp\@-\n//;
745 $p =~ s/^\tmovel d5,sp\@-\n//; # SMmark.* only?
746 $p =~ s/^\tmoveml \#0x[0-9a-f]+,sp\@-\n//; # SMmark.* only?
747 } elsif ($TargetPlatform =~ /^mips-/) {
748 # the .frame/.mask/.fmask that we use is the same
749 # as that produced by GCC for miniInterpret; this
750 # gives GDB some chance of figuring out what happened
751 $FRAME = "\t.frame\t\$sp,2168,\$31\n\t.mask\t0x90000000,-4\n\t.fmask\t0x00000000,0\n";
752 $p =~ s/^\t\.(frame).*\n/__FRAME__/g;
753 $p =~ s/^\t\.(mask|fmask).*\n//g;
754 $p =~ s/^\t\.cprestore.*\n/\t\.cprestore 416\n/; # 16 + 100 4-byte args
755 $p =~ s/^\tsubu\t\$sp,\$sp,\d+\n//;
756 $p =~ s/^\tsw\t\$31,\d+\(\$sp\)\n//;
757 $p =~ s/^\tsw\t\$fp,\d+\(\$sp\)\n//;
758 $p =~ s/^\tsw\t\$28,\d+\(\$sp\)\n//;
759 $p =~ s/__FRAME__/$FRAME/;
760 } elsif ($TargetPlatform =~ /^powerpc-apple-.*/) {
762 $pcrel_label =~ s/(.|\n)*^(L\d+\$pb):\n(.|\n)*/$2/ or $pcrel_label = "";
764 $p =~ s/^\tmflr r0\n//;
765 $p =~ s/^\tbl saveFP # f\d+\n//;
766 $p =~ s/^\tbl saveFP ; save f\d+-f\d+\n//;
767 $p =~ s/^L\d+\$pb:\n//;
768 $p =~ s/^\tstmw r\d+,-\d+\(r1\)\n//;
769 $p =~ s/^\tstfd f\d+,-\d+\(r1\)\n//g;
770 $p =~ s/^\tstw r0,\d+\(r1\)\n//g;
771 $p =~ s/^\tstwu r1,-\d+\(r1\)\n//;
772 $p =~ s/^\tstw r\d+,-\d+\(r1\)\n//g;
773 $p =~ s/^\tbcl 20,31,L\d+\$pb\n//;
774 $p =~ s/^L\d+\$pb:\n//;
775 $p =~ s/^\tmflr r31\n//;
777 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
778 # under some circumstances, only when generating position dependent code.
779 # I have no idea why, and I don't think it is necessary, so let's toss it.
780 $p =~ s/^\tli r\d+,0\n//g;
781 $p =~ s/^\tstw r\d+,\d+\(r1\)\n//g;
782 } elsif ($TargetPlatform =~ /^powerpc-.*-linux/) {
783 $p =~ s/^\tmflr 0\n//;
784 $p =~ s/^\tstmw \d+,\d+\(1\)\n//;
785 $p =~ s/^\tstfd \d+,\d+\(1\)\n//g;
786 $p =~ s/^\tstw r0,8\(1\)\n//;
787 $p =~ s/^\tstwu 1,-\d+\(1\)\n//;
788 $p =~ s/^\tstw \d+,\d+\(1\)\n//g;
790 # This is bad: GCC 3 seems to zero-fill some local variables in the prologue
791 # under some circumstances, only when generating position dependent code.
792 # I have no idea why, and I don't think it is necessary, so let's toss it.
793 $p =~ s/^\tli \d+,0\n//g;
794 $p =~ s/^\tstw \d+,\d+\(1\)\n//g;
796 print STDERR "$Pgm: unknown prologue mangling? $TargetPlatform\n";
799 # HWL HACK: dont die, just print a warning
800 #print stderr "HWL: this should die! Prologue junk?: $p\n" if $p =~ /^\t[^\.]/;
801 die "Prologue junk?: $p\n" if $p =~ /^\s+[^\s\.]/;
803 if ($TargetPlatform =~ /^powerpc-apple-.*/ && $pcrel_label ne "") {
804 # on PowerPC, we have to keep a part of the prologue
805 # (which loads the current instruction pointer into register r31)
806 $p .= "bcl 20,31,$pcrel_label\n";
807 $p .= "$pcrel_label:\n";
808 $p .= "\tmflr r31\n";
811 # glue together what's left
816 if ( $TargetPlatform =~ /^mips-/ ) {
817 # MIPS: first, this basic sequence may occur "--- END ---" or not
818 $c =~ s/^\tlw\t\$31,\d+\(\$sp\)\n\taddu\t\$sp,\$sp,\d+\n\tj\t\$31\n\t\.end/\t\.end/;
821 # toss all epilogue stuff; again, paranoidly
822 if ( $c =~ /--- END ---/ ) {
823 if (($r, $e) = split(/--- END ---/, $c)) {
824 if ($TargetPlatform =~ /^i386-/) {
826 $e =~ s/^\tpopl\s+\%edi\n//;
827 $e =~ s/^\tpopl\s+\%esi\n//;
828 $e =~ s/^\tpopl\s+\%edx\n//;
829 $e =~ s/^\tpopl\s+\%ecx\n//;
830 $e =~ s/^\taddl\s+\$\d+,\s*\%esp\n//;
831 $e =~ s/^\tsubl\s+\$-\d+,\s*\%esp\n//;
832 } elsif ($TargetPlatform =~ /^ia64-/) {
833 $e =~ s/^\tmov ar\.pfs = r\d+\n//;
834 $e =~ s/^\tmov b0 = r\d+\n//;
835 $e =~ s/^\t\.restore sp\n\tadds r12 = \d+, r12\n//;
836 $e =~ s/^\tbr\.ret\.sptk\.many b0\n//;
837 $e =~ s/^\t\.(mii|mmi|mib)\n//g; # bundling is no longer sensible
838 $e =~ s/^\t;;\n//g; # discard stops - stop at end of body is sufficient
839 $e =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
840 } elsif ($TargetPlatform =~ /^m68k-/) {
841 $e =~ s/^\tunlk a6\n//;
843 } elsif ($TargetPlatform =~ /^mips-/) {
844 $e =~ s/^\tlw\t\$31,\d+\(\$sp\)\n//;
845 $e =~ s/^\tlw\t\$fp,\d+\(\$sp\)\n//;
846 $e =~ s/^\taddu\t\$sp,\$sp,\d+\n//;
847 $e =~ s/^\tj\t\$31\n//;
848 } elsif ($TargetPlatform =~ /^powerpc-apple-.*/) {
849 $e =~ s/^\taddi r1,r1,\d+\n//;
850 $e =~ s/^\tcal r1,\d+\(r1\)\n//;
851 $e =~ s/^\tlw?z? r\d+,\d+\(r1\)\n//;
852 $e =~ s/^\tmtlr r0\n//;
854 $e =~ s/^\tb restFP ;.*\n//;
856 print STDERR "$Pgm: unknown epilogue mangling? $TargetPlatform\n";
859 print STDERR "WARNING: Epilogue junk?: $e\n" if $e =~ /^\t\s*[^\.\s\n]/;
861 # glue together what's left
863 $c =~ s/\n\t\n/\n/; # junk blank line
867 # On SPARCs, we don't do --- BEGIN/END ---, we just
868 # toss the register-windowing save/restore/ret* instructions
870 if ( $TargetPlatform =~ /^sparc-/ ) {
871 $c =~ s/^\t(save.*|restore.*|ret|retl)\n//g;
872 # throw away PROLOGUE comments
873 $c =~ s/^\t!#PROLOGUE# 0\n\t!#PROLOGUE# 1\n//;
876 # On Alphas, the prologue mangling is done a little later (below)
878 # toss all calls to __DISCARD__
879 $c =~ s/^\t(call|jbsr|jal)\s+${T_US}__DISCARD__\n//go;
880 $c =~ s/^\tjsr\s+\$26\s*,\s*${T_US}__DISCARD__\n//go if $TargetPlatform =~ /^alpha-/;
881 $c =~ s/^\tbl\s+L___DISCARD__\$stub\n//go if $TargetPlatform =~ /^powerpc-apple-.*/;
882 $c =~ s/^\tbl\s+__DISCARD__\n//go if $TargetPlatform =~ /^powerpc-.*-linux/;
884 # IA64: mangle tailcalls into jumps here
885 if ($TargetPlatform =~ /^ia64-/) {
886 while ($c =~ s/^\tbr\.call\.sptk\.many b0 = (.*)\n(?:^\.L([0-9]*):\n)?(?:\t;;\n)?(?:\tmov r1 = r\d+\n)?(?:\t;;\n)?\t--- TAILCALL ---\n(?:\t;;\n\tbr \.L\d+\n)?/\tbr\.few $1\n/) {
887 # Eek, the gcc optimiser is getting smarter... if we see a jump to the --- TAILCALL ---
888 # marker then we reapply the substitution at the source sites
889 $c =~ s/^\tbr \.L$2\n/\t--- TAILCALL ---\n/g if ($2);
893 # MIPS: that may leave some gratuitous asm macros around
894 # (no harm done; but we get rid of them to be tidier)
895 $c =~ s/^\t\.set\tnoreorder\n\t\.set\tnomacro\n\taddu\t(\S+)\n\t\.set\tmacro\n\t\.set\treorder\n/\taddu\t$1\n/
896 if $TargetPlatform =~ /^mips-/;
898 # toss stack adjustment after DoSparks
899 $c =~ s/^(\tjbsr _DoSparks\n)\taddqw #8,sp/$1/g
900 if $TargetPlatform =~ /^m68k-/; # this looks old...
902 if ( $TargetPlatform =~ /^alpha-/ &&
903 ! $magic_rdata_seen &&
904 $c =~ /^\s*\.rdata\n\t\.quad 0\n\t\.align \d\n/ ) {
905 $c =~ s/^\s*\.rdata\n\t\.quad 0\n\t\.align (\d)\n/\.rdata\n\t\.align $1\n/;
906 $magic_rdata_seen = 1;
909 # pick some end-things and move them to the next chunk
911 # pin a funny end-thing on (for easier matching):
912 $c .= 'FUNNY#END#THING';
914 while ( $c =~ /${T_MOVE_DIRVS}FUNNY#END#THING/o ) {
918 # on x86 we try not to copy any directives into a literal
919 # chunk, rather we keep looking for the next real chunk. This
920 # is because we get things like
922 # .globl blah_closure
928 if ( $TargetPlatform =~ /^(i386|sparc|powerpc)/ && $to_move =~ /${T_COPY_DIRVS}/ ) {
930 while ( $j < $numchks && $chk[$j] =~ /$T_CONST_LBL/) {
933 if ( $j < $numchks ) {
934 $chk[$j] = $to_move . $chk[$j];
938 elsif ( $i < ($numchks - 1)
939 && ( $to_move =~ /${T_COPY_DIRVS}/
940 || ($TargetPlatform =~ /^hppa/ && $to_move =~ /align/ && $chkcat[$i+1] eq 'literal') )) {
941 $chk[$i + 1] = $to_move . $chk[$i + 1];
942 # otherwise they're tossed
945 $c =~ s/${T_MOVE_DIRVS}FUNNY#END#THING/FUNNY#END#THING/o;
948 if ( $TargetPlatform =~ /^alpha-/ && $c =~ /^\t\.ent\s+(\S+)/ ) {
950 # toss all prologue stuff, except for loading gp, and the ..ng address
951 unless ($c =~ /\.ent.*\n\$.*\.\.ng:/) {
952 if (($p, $r) = split(/^\t\.prologue/, $c)) {
953 if (($keep, $junk) = split(/\.\.ng:/, $p)) {
954 $keep =~ s/^\t\.frame.*\n/\t.frame \$30,0,\$26,0\n/;
955 $keep =~ s/^\t\.(mask|fmask).*\n//g;
956 $c = $keep . "..ng:\n";
958 print STDERR "malformed code block ($ent)?\n"
961 $c .= "\t.prologue" . $r;
965 $c =~ s/FUNNY#END#THING//;
967 # print STDERR "\nCHK $i (AFTER) (",$chkcat[$i],"):\n", $c;
969 $chk[$i] = $c; # update w/ convenience copy
972 # open CHUNKS, ">/tmp/chunks2" or die "Cannot open /tmp/chunks2: $!\n";
973 # for (my $i = 0; $i < @chk; ++$i) { print CHUNKS "======= $i =======\n", $chk[$i] }
976 if ( $TargetPlatform =~ /^alpha-/ ) {
977 # print out the header stuff first
978 $chk[0] =~ s/^(\t\.file.*)"(ghc\d+\.c)"/$1"$ifile_root.hc"/;
979 print OUTASM $chk[0];
981 } elsif ( $TargetPlatform =~ /^hppa/ ) {
982 print OUTASM $chk[0];
984 } elsif ( $TargetPlatform =~ /^mips-/ ) {
985 $chk[0] = "\t\.file\t1 \"$ifile_root.hc\"\n" . $chk[0];
987 # get rid of horrible "<dollar>Revision: .*$" strings
988 local(@lines0) = split(/\n/, $chk[0]);
990 while ( $z <= $#lines0 ) {
991 if ( $lines0[$z] =~ /^\t\.byte\t0x24,0x52,0x65,0x76,0x69,0x73,0x69,0x6f$/ ) {
994 while ( $z <= $#lines0 ) {
996 last if $lines0[$z] =~ /[,\t]0x0$/;
1002 $chk[0] = join("\n", @lines0);
1003 $chk[0] =~ s/\n\n+/\n/;
1004 print OUTASM $chk[0];
1007 # print out all the literal strings next
1008 for ($i = 0; $i < $numchks; $i++) {
1009 if ( $chkcat[$i] eq 'literal' ) {
1010 print OUTASM $T_HDR_literal, $chk[$i];
1011 print OUTASM "; end literal\n" if $TargetPlatform =~ /^hppa/; # for the splitter
1013 $chkcat[$i] = 'DONE ALREADY';
1017 # on the HPPA, print out all the bss next
1018 if ( $TargetPlatform =~ /^hppa/ ) {
1019 for ($i = 1; $i < $numchks; $i++) {
1020 if ( $chkcat[$i] eq 'bss' ) {
1021 print OUTASM "\t.SPACE \$PRIVATE\$\n\t.SUBSPA \$BSS\$\n\t.align 4\n";
1022 print OUTASM $chk[$i];
1024 $chkcat[$i] = 'DONE ALREADY';
1029 for ($i = $FIRST_MANGLABLE; $i < $numchks; $i++) {
1030 # print STDERR "$i: cat $chkcat[$i], symb $chksymb[$i]\n";
1032 next if $chkcat[$i] eq 'DONE ALREADY';
1034 if ( $chkcat[$i] eq 'misc' ) {
1035 if ($chk[$i] ne '') {
1036 print OUTASM $T_HDR_misc;
1037 &print_doctored($chk[$i], 0);
1040 } elsif ( $chkcat[$i] eq 'toss' ) {
1041 print STDERR "*** NB: TOSSING code for $chksymb[$i] !!! ***\n";
1043 } elsif ( $chkcat[$i] eq 'data' ) {
1044 if ($chk[$i] ne '') {
1045 print OUTASM $T_HDR_data;
1046 print OUTASM $chk[$i];
1049 } elsif ( $chkcat[$i] eq 'splitmarker' ) {
1050 # we can just re-constitute this one...
1051 # NB: we emit _three_ underscores no matter what,
1052 # so ghc-split doesn't have to care.
1053 print OUTASM "___stg_split_marker",$chksymb[$i],"${T_POST_LBL}\n";
1055 } elsif ( $chkcat[$i] eq 'closure'
1056 || $chkcat[$i] eq 'srt'
1057 || $chkcat[$i] eq 'infotbl'
1058 || $chkcat[$i] eq 'entry') { # do them in that order
1059 $symb = $chksymb[$i];
1062 if ( defined($closurechk{$symb}) ) {
1063 print OUTASM $T_HDR_closure;
1064 print OUTASM $chk[$closurechk{$symb}];
1065 $chkcat[$closurechk{$symb}] = 'DONE ALREADY';
1069 if ( defined($srtchk{$symb}) ) {
1070 print OUTASM $T_HDR_rodata;
1071 print OUTASM $chk[$srtchk{$symb}];
1072 $chkcat[$srtchk{$symb}] = 'DONE ALREADY';
1076 if ( defined($infochk{$symb}) ) {
1078 print OUTASM $T_HDR_info;
1079 print OUTASM &rev_tbl($symb, $chk[$infochk{$symb}], 1);
1081 # entry code will be put here!
1083 $chkcat[$infochk{$symb}] = 'DONE ALREADY';
1087 if ( defined($entrychk{$symb}) ) {
1089 $c = $chk[$entrychk{$symb}];
1091 # If this is an entry point with an info table,
1092 # eliminate the entry symbol and all directives involving it.
1093 if (defined($infochk{$symb}) && $TargetPlatform !~ /^ia64-/) {
1094 $c =~ s/^.*$symb_(entry|ret)${T_POST_LBL}\n//;
1095 $c =~ s/^\s*\..*$symb.*\n//g;
1098 print OUTASM $T_HDR_entry;
1100 &print_doctored($c, 1); # NB: the 1!!!
1102 $chkcat[$entrychk{$symb}] = 'DONE ALREADY';
1105 } elsif ( $chkcat[$i] eq 'vector' ) {
1106 $symb = $chksymb[$i];
1109 if ( defined($vectorchk{$symb}) ) {
1110 print OUTASM $T_HDR_vector;
1111 print OUTASM &rev_tbl($symb, $chk[$vectorchk{$symb}], 0);
1113 # direct return code will be put here!
1114 $chkcat[$vectorchk{$symb}] = 'DONE ALREADY';
1116 } elsif ( $TargetPlatform =~ /^alpha-/ ) {
1117 # Alphas: the commented nop is for the splitter, to ensure
1118 # that no module ends with a label as the very last
1119 # thing. (The linker will adjust the label to point
1120 # to the first code word of the next module linked in,
1121 # even if alignment constraints cause the label to move!)
1123 print OUTASM "\t# nop\n";
1126 } elsif ( $chkcat[$i] eq 'rodata' ) {
1127 print OUTASM $T_HDR_rodata;
1128 print OUTASM $chk[$i];
1129 $chkcat[$i] = 'DONE ALREADY';
1131 } elsif ( $chkcat[$i] eq 'toc' ) {
1132 # silly optimisation to print tocs, since they come in groups...
1133 print OUTASM $T_HDR_toc;
1135 while ($chkcat[$j] eq 'toc')
1136 { if ( $chk[$j] !~ /\.tc UpdatePAP\[TC\]/ # not needed: always turned into a jump.
1139 print OUTASM $chk[$j];
1141 $chkcat[$j] = 'DONE ALREADY';
1145 } elsif ( $TargetPlatform =~ /^powerpc-apple-.*/ && $chkcat[$i] eq 'dyld' ) {
1146 # powerpc-apple: dynamic linker stubs
1147 if($chk[$i] !~ /\.indirect_symbol ___DISCARD__/)
1148 { # print them out unchanged, but remove the stubs for __DISCARD__
1149 print OUTASM $chk[$i];
1152 &tidy_up_and_die(1,"$Pgm: unknown chkcat (ghc-asm: $TargetPlatform)\n$chkcat[$i]\n$chk[$i]\n");
1156 print OUTASM $EXTERN_DECLS if $TargetPlatform =~ /^mips-/;
1159 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1160 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1165 sub hppa_mash_prologue { # OK, epilogue, too
1168 # toss all prologue stuff
1169 s/^\s+\.ENTRY[^\0]*--- BEGIN ---/\t.ENTRY/;
1171 # Lie about our .CALLINFO
1172 s/^\s+\.CALLINFO.*$/\t.CALLINFO NO_CALLS,NO_UNWIND/;
1179 # toss all epilogue stuff
1180 s/^\s+--- END ---[^\0]*\.EXIT/\t.EXIT/;
1182 # Sorry; we moved the _info stuff to the code segment.
1183 s/_info,DATA/_info,CODE/g;
1190 sub print_doctored {
1191 local($_, $need_fallthru_patch) = @_;
1193 if ( $TargetPlatform !~ /^i386-/
1194 || ! /^\t[a-z]/ # no instructions in here, apparently
1195 || /^${T_US}__stginit_[A-Za-z0-9_]+${T_POST_LBL}/) {
1199 # OK, must do some x86 **HACKING**
1201 local($entry_patch) = '';
1202 local($exit_patch) = '';
1204 # gotta watch out for weird instructions that
1205 # invisibly smash various regs:
1206 # rep* %ecx used for counting
1207 # scas* %edi used for destination index
1208 # cmps* %e[sd]i used for indices
1209 # loop* %ecx used for counting
1214 # * use of STG reg [ nn(%ebx) ] where no machine reg avail
1216 # * GCC used an "STG reg" for its own purposes
1218 # * some secret uses of machine reg, requiring STG reg
1219 # to be saved/restored
1221 # The most dangerous "GCC uses" of an "STG reg" are when
1222 # the reg holds the target of a jmp -- it's tricky to
1223 # insert the patch-up code before we get to the target!
1224 # So here we change the jmps:
1226 # --------------------------------------------------------
1227 # it can happen that we have jumps of the form...
1228 # jmp *<something involving %esp>
1230 # jmp <something involving another naughty register...>
1232 # a reasonably-common case is:
1234 # movl $_blah,<bad-reg>
1238 s/^\tmovl\s+\$${T_US}(.*),\s*(\%e[abcd]x)\n\tjmp\s+\*\2/\tjmp $T_US$1/g;
1240 if ($StolenX86Regs <= 2 ) { # YURGH! spurious uses of esi?
1241 s/^\tmovl\s+(.*),\s*\%esi\n\tjmp\s+\*%esi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1242 s/^\tjmp\s+\*(.*\(.*\%esi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1243 s/^\tjmp\s+\*\%esi\n/\tmovl \%esi,\%eax\n\tjmp \*\%eax\n/g;
1244 die "$Pgm: (mangler) still have jump involving \%esi!\n$_"
1245 if /(jmp|call)\s+.*\%esi/;
1247 if ($StolenX86Regs <= 3 ) { # spurious uses of edi?
1248 s/^\tmovl\s+(.*),\s*\%edi\n\tjmp\s+\*%edi\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1249 s/^\tjmp\s+\*(.*\(.*\%edi.*\))\n/\tmovl $1,\%eax\n\tjmp \*\%eax\n/g;
1250 s/^\tjmp\s+\*\%edi\n/\tmovl \%edi,\%eax\n\tjmp \*\%eax\n/g;
1251 die "$Pgm: (mangler) still have jump involving \%edi!\n$_"
1252 if /(jmp|call)\s+.*\%edi/;
1255 # OK, now we can decide what our patch-up code is going to
1258 # Offsets into register table - you'd better update these magic
1259 # numbers should you change its contents!
1260 # local($OFFSET_R1)=0; No offset for R1 in new RTS.
1261 local($OFFSET_Hp)=88;
1263 # Note funky ".=" stuff; we're *adding* to these _patch guys
1264 if ( $StolenX86Regs <= 2
1265 && ( /[^0-9]\(\%ebx\)/ || /\%esi/ || /^\tcmps/ ) ) { # R1 (esi)
1266 $entry_patch .= "\tmovl \%esi,(\%ebx)\n";
1267 $exit_patch .= "\tmovl (\%ebx),\%esi\n";
1269 # nothing for call_{entry,exit} because %esi is callee-save
1271 if ( $StolenX86Regs <= 3
1272 && ( /${OFFSET_Hp}\(\%ebx\)/ || /\%edi/ || /^\t(scas|cmps)/ ) ) { # Hp (edi)
1273 $entry_patch .= "\tmovl \%edi,${OFFSET_Hp}(\%ebx)\n";
1274 $exit_patch .= "\tmovl ${OFFSET_Hp}(\%ebx),\%edi\n";
1276 # nothing for call_{entry,exit} because %edi is callee-save
1279 # --------------------------------------------------------
1280 # next, here we go with non-%esp patching!
1282 s/^(\t[a-z])/$entry_patch$1/; # before first instruction
1284 # Before calling GC we must set up the exit condition before the call
1285 # and entry condition when we come back
1287 # fix _all_ non-local jumps:
1289 s/^\tjmp\s+\*${T_X86_PRE_LLBL_PAT}/\tJMP___SL/go;
1290 s/^\tjmp\s+${T_X86_PRE_LLBL_PAT}/\tJMP___L/go;
1292 s/^(\tjmp\s+.*\n)/$exit_patch$1/g; # here's the fix...
1294 s/^\tJMP___SL/\tjmp \*${T_X86_PRE_LLBL}/go;
1295 s/^\tJMP___L/\tjmp ${T_X86_PRE_LLBL}/go;
1297 if ($StolenX86Regs == 2 ) {
1298 die "ARGH! Jump uses \%esi or \%edi with -monly-2-regs:\n$_"
1299 if /^\t(jmp|call)\s+.*\%e(si|di)/;
1300 } elsif ($StolenX86Regs == 3 ) {
1301 die "ARGH! Jump uses \%edi with -monly-3-regs:\n$_"
1302 if /^\t(jmp|call)\s+.*\%edi/;
1305 # --------------------------------------------------------
1306 # that's it -- print it
1308 #die "Funny jumps?\n$_" if /${T_X86_BADJMP}/o; # paranoia
1312 if ( $need_fallthru_patch ) { # exit patch for end of slow entry code
1313 print OUTASM $exit_patch;
1314 # ToDo: make it not print if there is a "jmp" at the end
1320 sub init_FUNNY_THINGS {
1321 %KNOWN_FUNNY_THING = (
1323 # "${T_US}stg_.*{T_POST_LBL}", 1,
1328 The following table reversal is used for both info tables and return
1329 vectors. In both cases, we remove the first entry from the table,
1330 reverse the table, put the label at the end, and paste some code
1331 (that which is normally referred to by the first entry in the table)
1332 right after the table itself. (The code pasting is done elsewhere.)
1336 local($symb, $tbl, $discard1) = @_;
1338 return ($tbl) if ($TargetPlatform =~ /^ia64-/);
1340 local($before) = '';
1342 local(@imports) = (); # hppa only
1345 local(@lines) = split(/\n/, $tbl);
1348 # Deal with the header...
1349 for ($i = 0; $i <= $#lines && $lines[$i] !~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1350 $label .= $lines[$i] . "\n",
1351 next if $lines[$i] =~ /^[A-Za-z0-9_]+_info${T_POST_LBL}$/o
1352 || $lines[$i] =~ /${T_DOT_GLOBAL}/o
1353 || $lines[$i] =~ /^${T_US}\S+_vtbl${T_POST_LBL}$/o;
1355 $before .= $lines[$i] . "\n"; # otherwise...
1358 # Grab the table data...
1359 if ( $TargetPlatform !~ /^hppa/ ) {
1360 for ( ; $i <= $#lines && $lines[$i] =~ /^\t?${T_DOT_WORD}\s+/o; $i++) {
1361 push(@words, $lines[$i]);
1363 } else { # hppa weirdness
1364 for ( ; $i <= $#lines && $lines[$i] =~ /^\s+(${T_DOT_WORD}|\.IMPORT)/; $i++) {
1365 if ($lines[$i] =~ /^\s+\.IMPORT/) {
1366 push(@imports, $lines[$i]);
1368 # We don't use HP's ``function pointers''
1369 # We just use labels in code space, like normal people
1370 $lines[$i] =~ s/P%//;
1371 push(@words, $lines[$i]);
1376 # Now throw away any initial zero word from the table. This is a hack
1377 # that lets us reduce the size of info tables when the SRT field is not
1378 # needed: see comments StgFunInfoTable in InfoTables.h.
1380 # The .zero business is for Linux/ELF.
1381 # The .skip business is for Sparc/Solaris/ELF.
1382 # The .blockz business is for HPPA.
1384 # if ($words[0] =~ /^\t?(${T_DOT_WORD}\s+0|\.zero\s+4|\.skip\s+4|\.blockz\s+4)/) {
1389 for (; $i <= $#lines; $i++) {
1390 $after .= $lines[$i] . "\n";
1393 # Alphas: If we have anonymous text (not part of a procedure), the
1394 # linker may complain about missing exception information. Bleh.
1395 # To suppress this, we place a .ent/.end pair around the code.
1396 # At the same time, we have to be careful and not enclose any leading
1397 # .file/.loc directives.
1398 if ( $TargetPlatform =~ /^alpha-/ && $label =~ /^([A-Za-z0-9_]+):$/) {
1399 local ($ident) = $1;
1400 $before =~ s/^((\s*\.(file|loc)\s+[^\n]*\n)*)/$1\t.ent $ident\n/;
1401 $after .= "\t.end $ident\n";
1404 # Alphas: The heroic Simon Marlow found a bug in the Digital UNIX
1405 # assembler (!) wherein .quad constants inside .text sections are
1406 # first narrowed to 32 bits then sign-extended back to 64 bits.
1407 # This obviously screws up our 64-bit bitmaps, so we work around
1408 # the bug by replacing .quad with .align 3 + .long + .long [ccshan]
1409 if ( $TargetPlatform =~ /^alpha-/ ) {
1411 if (/^\s*\.quad\s+([-+0-9].*\S)\s*$/ && length $1 >= 10) {
1412 local ($number) = $1;
1413 if ($number =~ /^([-+])?(0x?)?([0-9]+)$/) {
1414 local ($sign, $base, $digits) = ($1, $2, $3);
1415 $base = (10, 8, 16)[length $base];
1416 local ($hi, $lo) = (0, 0);
1417 foreach $i (split(//, $digits)) {
1418 $j = $lo * $base + $i;
1419 $lo = $j % 4294967296;
1420 $hi = $hi * $base + ($j - $lo) / 4294967296;
1422 ($hi, $lo) = (4294967295 - $hi, 4294967296 - $lo)
1424 $_ = "\t.align 3\n\t.long $lo\n\t.long $hi\n";
1425 # printf STDERR "TURNING %s into 0x %08x %08x\n", $number, $hi, $lo;
1427 print STDERR "Cannot handle \".quad $number\" in info table\n";
1435 . (($TargetPlatform !~ /^hppa/) ? '' : join("\n", @imports) . "\n")
1436 . join("\n", @words) . "\n"
1439 # print STDERR "before=$before\n";
1440 # print STDERR "label=$label\n";
1441 # print STDERR "words=",(reverse @words),"\n";
1442 # print STDERR "after=$after\n";
1448 The HP is a major nuisance. The threaded code mangler moved info
1449 tables from data space to code space, but unthreaded code in the RTS
1450 still has references to info tables in data space. Since the HP
1451 linker is very precise about where symbols live, we need to patch the
1452 references in the unthreaded RTS as well.
1455 sub mini_mangle_asm_hppa {
1456 local($in_asmf, $out_asmf) = @_;
1458 open(INASM, "< $in_asmf")
1459 || &tidy_up_and_die(1,"$Pgm: failed to open `$in_asmf' (to read)\n");
1460 open(OUTASM,"> $out_asmf")
1461 || &tidy_up_and_die(1,"$Pgm: failed to open `$out_asmf' (to write)\n");
1464 s/_info,DATA/_info,CODE/; # Move _info references to code space
1470 close(OUTASM) || &tidy_up_and_die(1,"Failed writing to $out_asmf\n");
1471 close(INASM) || &tidy_up_and_die(1,"Failed reading from $in_asmf\n");
1477 sub tidy_up_and_die {
1478 local($return_val, $msg) = @_;
1480 exit (($return_val == 0) ? 0 : 1);